oj.uz

답안 #250982

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
250982 2020-07-19T17:47:50 Z Lightning 아름다운 순열 (IZhO12_beauty) C++14
100 / 100
 986 ms 164528 KB 
#include <iostream>
#include <algorithm>
#include <vector>
#include <cmath>
#include <set>
#include <map>
#include <iomanip>
#include <cassert>
#include <stack>
#include <queue>
#include <deque>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
//using namespace __gnu_pbds;

typedef long long ll;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;

// template<typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
//  order_of_key (k) : Number of items strictly smaller than k .
//  find_by_order(k) : K-th element in a set (counting from zero).
#define sz(a) (int)a.size()
#define all(a) a.begin(), a.end()
#define pb push_back
#define ppb pop_back
#define mkp make_pair
#define F first
#define S second
#define lb lower_bound
#define ub upper_bound
#define show(a) cerr << #a <<" -> "<< a <<" "
#define nl cerr <<"\n"
#define fo(a, b, c, d) for(int (a) = (b); (a) <= (c); (a) += (d))
#define foo(a, b, c ,d) for(int (a) = (b); (a) >= (c); (a) -= (d))
//#define int ll

const int N = 20;
const int oo = 1e9 + 5;

int n, c2[N], c3[N];
ll dp[(1 << N)][N];

void solve() {
    cin >> n;
    for (int i = 0; i < n; ++i) {
        int x;
        cin >> x;

        c2[i] = __builtin_popcount(x);

        while (x) {
            c3[i] += ((x % 3) == 1);
            x /= 3;
        }

        dp[(1 << i)][i] = 1;
    }

    for (int mask = 1; mask < (1 << n); ++mask) {
        if (__builtin_popcount(mask) == 1) { continue; }

        for (int i = 0; i < n; ++i) {
            if ((mask >> i) & 1) {
                int mask2 = mask ^ (1 << i);
                for (int j = 0; j < n; ++j) {
                    if (((mask2 >> j) & 1) &&
                        (c2[i] == c2[j] || c3[i] == c3[j])) {
                        dp[mask][i] += dp[mask2][j];
                    }
                }
            }
        }
    }

    ll ans = 0;
    for (int i = 0; i < n; ++i) {
        ans += dp[(1 << n) - 1][i];
    }
    cout << ans;
}

 main () {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	int tests = 1;
	//cin >> tests;
	while (tests --) {
		solve();
	}
	return 0;
}
/*
	“I’m not gonna run away, I never go back on my word! That’s my nindo: my ninja way.” Naruto
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*/

Compilation message

beauty.cpp:85:8: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  main () {
        ^

Subtask #1
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 1 ms 512 KB Output is correct
8 Correct 1 ms 512 KB Output is correct
9 Correct 1 ms 512 KB Output is correct
10 Correct 1 ms 512 KB Output is correct
11 Correct 17 ms 2944 KB Output is correct
12 Correct 12 ms 2944 KB Output is correct
13 Correct 42 ms 10616 KB Output is correct
14 Correct 215 ms 41468 KB Output is correct
15 Correct 179 ms 41356 KB Output is correct
16 Correct 219 ms 41336 KB Output is correct
17 Correct 246 ms 41336 KB Output is correct
18 Correct 226 ms 41336 KB Output is correct
19 Correct 986 ms 164476 KB Output is correct
20 Correct 770 ms 164528 KB Output is correct